Yuichi Ito defeated Yaoki Ishii 3-6 6-2 6-4 in the Japan F8 semi-final on hard. The upset overturned the form book — Yaoki Ishii came in leading the head-to-head 2–1. Yuichi Ito narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-09-17 | Japan F9 | R32 | carpet | Yuichi Ito | 6-1 6-1 |
| 2005-04-18 | Japan F2 | R32 | clay | Yaoki Ishii | 6-2 6-0 |
| 2005-04-11 | Japan F1 | R16 | carpet | Yaoki Ishii | 6-2 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.